Geoffrey Blewitt Research Professor Nevada Bureau of Mines and Geology/ Seismological Laboratory Mail Stop 178 University of Nevada Reno, Nevada 89557 Business Telephone (775) 682-8778 FAX (775) 784-1709 E-mail:gblewitt@unr.edu EDUCATION B.Sc. (1st Class Hons) Physics, Queen Mary College, University of London, 1981 Ph.D. Physics, California Institute of Technology, 1986 AREAS OF EXPERTISE Physics Parameter estimation and stochastic modeling Geodesy Global Positioning System (GPS) methodology GPS applications: - tsunami warning systems - plate tectonics - fault mechanics - earthquake cycle - Earth rotation and polar motion - global kinematic reference frames - Earth center of mass monitoring - loading of lithosphere/upper mantle - secular variation in sea level - ground fluid withdrawal - volcano monitoring - tropospheric water vapor - ionospheric total electron content - structural movement - precision navigation

Click here for the video interview on moving mountains." Click here for the Science paper.

• 1999-present, Research Professor, jointly at Nevada Bureau of Mines and Geology and Seismological Laboratory, University of Nevada, Reno
• 1999-present, Visiting Professor, Department of Geomatics, University of Newcastle upon Tyne, England.
• 1994-1999, Professor, Department of Geomatics, University of Newcastle upon Tyne, England
• 1985-1994, Group Supervisor, Space Geodesy and Geodynamics Systems Group, Jet Propulsion Laboratory, California Institute of Technology, Pasadena
• 1981-1985 Graduate Research Assistant, Department of Physics, California Institute of Technology, Pasadena

• International Geothermal Association
• American Geophysical Union (Fellow)
• International Association of Geodesy (Fellow)
• Seismological Society of America (Member)
• Geothermal Resources Council (Member)

• 2005: Co-Inventor on UK Patent Number GB2382482 for "Method for the reduction of errors in raw measured data related to predefined data."
• 2005: Elected Fellow of the American Geophysical Union.
• 2004: Mackay Faculty Achievement Award, Mackay School of Earth Science and Engineering.
• 2004: Certificate of Recognition, UNAVCO Inc., "..in appreciation for service as Chairman of the Board of Directors."
• 2004: The Space Foundation's Space Technology Hall of Fame, Certificate of Commendation, for "creation of Precision GPS Software System technology" and "successful transfer of space technology to Earth applications"
• 2004: E.B. Burwell Jr. Award, Geological Society of America, Engineering Geology Division, for "Land subsidence in Las Vegas, Nevada, 1935-2000: New geodetic data show evolution, revised spatial patterns, and reduced rates"
• 2003: Geothermal Resources Council Best Paper Award for "Targeting of potential geothermal resources in the Great Basin from regional to basin-scale relationships between geodetic strain and geological structures."
• 2002: American Geophysical Union Featured Lecture: "GPS, the interdisciplinary chameleon, How does it do that?" [movie] (requires QuickTime in browser)
• 2002:Association of Engineering Geologists Publication Award for "Land Land subsidence in Las Vegas, Nevada, 1935-2000: New geodetic data show evolution, revised spatial patterns, and reduced rates," 2002.
• 2001: International GPS Service Certificate of Appreciation for Outstanding Service for "years of dedicated innovation and expertise in furthering the excellence of GPS analysis."
• 2001: Co-Inventor on U.S. Patent No. 6,295,021, "Techniques for monitoring and controlling yaw attitude of a GPS satellite" [Assigned to California Institute of Technology, Sept. 25, 2001]
• 1999: Co-Inventor on U.S. Patent Number 5,963,167 for "Analyzing System for Global Positioning System and General Satellite Tracking." [Assigned to California Institute of Technology, Oct. 5, 1999]
• 1999: NASA Group Achievement Award for "Earth-rotation measurement system based on GPS"
• 1999: Elected Fellow of the International Association of Geodesy
• 1998: American Geophysical Union, Outstanding Student Paper Award, Geodesy Section (co-author)
• 1997: Shell Expro Technology and Innovation Award: for "Platform Subsidence and Structural Monitoring using GPS"
• 1995: Runner up, NASA Software of the Year Competition
• 1995: NASA Certificate of Recognition "for the creative development of a scientific contribution of significant value in the advancement of the aerospace technology program of NASA, GIPSY OASIS II"
• 1994: NASA Group Achievement Award for "Techniques that permit determination of a global reference frame accurate to 1 cm"
• 1993: NASA Certificate of Recognition for "Precise determination of Earth's center of mass using measurements from GPS"
• 1993: NASA Certificate of Recognition for "Daily estimates of the Earth's pole position with GPS"
• 1993: NASA Certificate of Recognition for "Global geodesy using GPS without fiducial sites"
• 1992: NASA Group Achievement Award for "Development of pioneering OASIS/GIPSY software that has set the world standard"
• 1991: NASA Certificate of Recognition for "Precise regional baseline estimation using a priori orbital information"
• 1989: Jet Propulsion Laboratory Director's Research Achievement Award "Development of innovative analysis techniques for GPS data and the first demonstration of GPS-based relative positioning to the subcentimeter level over 1000 km"
• 1987: American Astronomical Society Bruno Rossi Prize, for "Detection of Neutrinos from Supernova SN1987A."
• 1981: Queen Mary College, University of London, Best Physics Student Award.

Taylor, G.E., and G. Blewitt, “Intelligent Positioning: GIS-GPS Unification,” John Wiley and Sons Ltd., London, UK., 200 pp., ISBN: 0-470-85003-5, 2006. This book can be ordered at: [NBMG]; [Wiley US]; [Wiley Europe]; [Amazon US]; or [Amazon UK].

Contributions to Books

Blewitt, G. (2007), GPS and Space Based Geodetic Methods, chapter in Treatise on Geophysics, Vol. 3., pp. 351-390, Ed. Thomas Herring, Ed.-in-chief Gerald Schubert, Academic Press, Oxford, UK, ISBN: 0-444-51928-9. [pdf]

Blewitt, G., "GPS Data Processing Methodology: From Theory to Applications," in GPS for Geodesy, p. 231-270, Eds. P.J.G. Teunissen and A. Kleusberg, Springer-Verlag, Berlin, ISBN 3-540-63661-7(1998) [pdf]

Blewitt, G., "Global Positioning Satellites," in Macmillan Encyclopedia of the Earth Sciences, p. 432-436, Macmillan, New York, ISBN 0-02-883000-8 (1998)

Blewitt, G, "Basics of the GPS Technique: Observation Equations," in Geodetic Applications of GPS, p. 10-54, ed. B. Johnson, Nordic Geodetic Commission, Sweden, ISSN 0280-5731(1997) [pdf]

Blewitt, G., "Advances in Global Positioning System technology for geodynamics investigations," in Contributions of Space Geodesy to Geodynamics: Technology, Ed. by D.E. Smith and D.L. Turcotte, p. 195-213, Pub. by American Geophysical Union (Geodynamics Series Vol. 25), Washington DC, ISBN 0-87590-526-9(1993) [pdf]

Refereed Publications

Blewitt, G. (2008), Fixed point theorems of GPS carrier phase ambiguity resolution and their application to massive network processing: Ambizap, J. Geophys. Res., 113, B12410, doi:10.1029/2008JB005736. [pdf]

Blewitt, G., Hammond, W.C., Kreemer, C. (in press). Geodetic observation of contemporary strain in the northern Walker Lane:1, Semi-permanent GPS strategy. Late Cenozoic Structure and Evolution of the Great Basin – Sierra Nevada Transition, Geological Society of America.

Kreemer, C. W., Blewitt, G., Hammond, W.C. (in press). Geodetic observation of contemporary strain in the northern Walker Lane:2, Vector and strain rate tensor analysis. Late Cenozoic Structure and Evolution of the Great Basin – Sierra Nevada Transition, Geological Society of America.

Hammond, W. C., Kreemer, C. W., Blewitt, G. (in press). Geodetic observation of contemporary strain in the northern Walker Lane:3, Central Nevada Seismic Belt postseismic relaxation. Late Cenozoic Structure and Evolution of the Great Basin – Sierra Nevada Transition, Geological Society of America.

Blewitt, G. (2007), GPS and Space Based Geodetic Methods, chapter in Treatise on Geophysics, Vol. 3., pp. 351-390, Ed. Thomas Herring, Ed.-in-chief Gerald Schubert, Academic Press, Oxford, UK, ISBN: 0-444-51928-9. [pdf]

Clarke, P.J., D.A. Lavallée, G. Blewitt, and T. van Dam (2007), Basis functions for the consistent and accurate representation of surface mass loading, Geophys. Journ. Int., 10 pp.,doi:10.1111/j.1365-246X.2007.03493.x [pdf]

Gross, R.S., D.A. Lavallée, G. Blewitt, and P.J. Clarke (in press), Consistency of Earth rotation, gravity, and shape measurements, International Association of Geodesy Symposia, Volume 131, 8 pp., Springer Verlag, Berlin [pdf].

Hammond, W.C., C. Kreemer, G. Blewitt, (2007), Exploring the relationship between geothermal resources and geodetically inferred slip rates on faults in the Great Basin, Geothermal Resources Council Transactions, vol. 31. [pdf]

Kreemer, C., Blewitt, G. (2006), Hammond, W.C.. Using geodesy to explore correlations between crustal deformation characteristics and geothermal resources (vol. 30, pp. 441-446). Davis, California: Geothermal Resources Council Transactions. [pdf]

Plag, H.-P., Blewitt, G., Kreemer, C., & Hammond, W. C. (2006). Solid Earth deformations induced by the Sumatra earthquakes of 2004-2005: GPS detection of co-seismic displacements and tsunami-induced loading. In Tregoning, P. and Rizos, C. (eds.): Dynamic Planet - Monitoring and Understanding a Dynamic Planet with Geodetic and Oceanographic Tools, International Association of Geodesy Symposia, Volume 130, 549-556, Springer Verlag, Berlin. [pdf]

Kreemer, C., D. A. Lavallée, G. Blewitt, and W. E. Holt, On the stability of a geodetic no-net-rotation frame and its implication for the International Terrestrial Reference Frame, Geophys. Res. Lett., Vol. 33, L17306, doi:10.1029/2006GL027058, 2006.[pdf]

Hill, E.M., G. Blewitt, Testing for fault activity at Yucca Mountain, Nevada, using independent GPS results from the BARGEN network, Geophys. Res. Lett., Vol 33, L14302, doi:10.1029/2006GL026140, 2006. [pdf]

Blewitt, G., C. Kreemer, W. C. Hammond, H.-P. Plag, S. Stein, and E. Okal, Rapid determination of earthquake magnitude using GPS for tsunami warning systems, Geophys. Res. Lett., Vol. 33, L11309, doi:10.1029/2006GL026145, 2006. [pdf]

Taylor, G.E., and G. Blewitt, “Intelligent Positioning: GIS-GPS Unification,” John Wiley and Sons Ltd., London, UK., 200 pp., ISBN: 0-470-85003-5, 2006. This book can be ordered at: [NBMG]; [Wiley US]; [Wiley Europe]; [Amazon US]; or [Amazon UK].

Kreemer, C., G. Blewitt, and F. Maerten, Co- and postseismic deformation of the 28 March 2005 Nias Mw 8.7 earthquake from continuous GPS data, Geophys. Res. Lett. Vol. 33, L07307, doi:10.1029/2005GL025566, 2006. [pdf]

Lavallée, D.A., T. Van Dam, G. Blewitt, and P.J. Clarke, Geocenter Motions from GPS: A Unified Observation Model, Journ. Geophys. Res., Vol. 111, B05405, doi:10.1029/2005JB003784, 2006. [pdf]

Kreemer, C., G. Blewitt, W.C. Hammond, and H.-P. Plag, Global Deformation from the Great 2004 Sumatra-Andaman Earthquake Observed by GPS: Implications for Rupture Process and Global Reference Frame, Earth Planets and Space, Vol. 58, pp. 141-148, 2006. [pdf]

Coolbaugh, M., Zehner, R., Kreemer, C., Blackwell, D., Oppliger, G., Sawatzky, D., Blewitt, G., Pancha, A., Richards, M., Helm-Clark, C., Shevenell, L., Raines, G., Johnson, G., Minor, T., and Boyd, T., 2005, Geothermal potential map of the Great Basin, western United States, Nevada Bureau of Mines and Geology Map 151. [pdf] (WARNING; large download, 12.5 Mb)

Burbey, T.J., S.M. Warner, G. Blewitt, J.W. Bell and E. Hill, Three-dimensional deformation and strain induced by municipal pumping, part 1: Analysis of field data, Journal of Hydrology, doi:10.1016/j.jhydrol.2005.06.028 (2005) [pdf]

Holt, W.E., C. Kreemer, A.J. Haines, L. Estey, C. Meerterns, G. Blewitt, and D. Lavallee, Project helps constrain continental dynamics and seismic hazards, peer-reviewed article in Eos, Trans. AGU, Vol. 86, p. 383-387, (11 Oct. 2005) [pdf]

Blewitt, G., P. Clarke, D. Lavallée, and K. Nurutdinov, Application of Clebsch-Gordan Coefficients and isomorphic frame transformations to invert Earth's changing geometrical shape for continental hydrological loading and sea level's passive response, in A Window on the Future of Geodesy, ed. F. Sanso, Int. Assoc. Geodesy Vol. 128, pp. 518-523, Springer (2005) [pdf]

Clarke, P. J.; Lavallée, D. A.; Blewitt, G.; van Dam, T. M.; Wahr, J. M. Effect of gravitational consistency and mass conservation on seasonal surface mass loading models, Geophys. Res. Lett., Vol. 32, No. 8, L08306. 19 April 2005 [pdf]

Smith, K.D., D. von Seggern, G. Blewitt, L. Preston, J.G. Anderson, B.P. Wernicke, J.L. Davis, Evidence for deep magma injection beneath Lake Tahoe, Nevada-California, Science, doi:10.1126/science.1101304, 2004. [pdf], Video interview

Gross, R.S., G. Blewitt, P.J. Clarke, and D. Lavallée, Degree-2 harmonics of the Earth's mass load estimated from GPS and Earth rotation data, Geophys. Res. Lett., Vol. 31, L07601, doi:10.1029/2004GL019589, 2004 [pdf].

Blewitt, G., Fundamental ambiguity in the definition of vertical motion, Cahier du Centre Européen de Géodynamique et de Séismologie, Ed. T. van Dam & O. Francis, Vol. 23, p. 1-4, 2004 [pdf].

Blewitt, G. and P. Clarke, Inversion of Earth's changing shape to weigh sea level in static equilibrium with surface mass redistribution, Journ. Geophys. Res., 108 (B6), 2311, doi:10.1029/2002JB002290, 2003. [pdf]

Blewitt, G., Self-consistency in reference frames, geocenter definition, and surface loading of the solid Earth, Journ. Geophys. Res., Vol. 108(B2) 210, doi: 10.1029/2002JB002082, 2003. [pdf]

Lavallee, D., and G. Blewitt, Degree-one Earth deformation from very long baseline interferometry, Geophys. Res. Lett., Vol 29(20), doi:10.1029/2002GL015883, 2002. [pdf]

Bell, J.W., F. Amelung, A.R. Ramelli, and G. Blewitt, Land subsidence in Las Vegas, Nevada, 1935-2000: New geodetic data show evolution, revised spatial patterns, and reduced rates, Environmental and Engineering Geoscience, Vol. 8, No. 3, p. 155-174, 2002. [pdf]

Blewitt, G., and D. Lavallee, Effect of annual signals on geodetic velocity, Journ. Geophys. Res., Vol. 107(B7), 10.1029/2001JB000570, 2002. [pdf] [pdf_correction]

Blewitt, G, and D. Lavallee, Bias in geodetic site velocity due to annual signals, in "Vistas for Geodesy in the New Millenium", Int. Assoc. Geod. Symposia Vol. 125, p. 499-500, 2002.

Blewitt G., and G. Taylor, "Mapping Dilution of Precision (MDOP) and Map Matched GPS," Int. Journ. of GIS, Vol. 16, No. 1, pp. 55-67, 2002. [pdf]

Evans, A.G., (ed.), R.W. Hill (ed.), G. Blewitt, E. Swift, T.P. Yunck, R. Hatch, S.M. Lichten, S. Malys, J. Bossler, and J.P. Cunningham, "The Global Positioning System Geodesy Odyssey," Navigation, Journ. of the Inst. of Navigation, Vol. 49(1), 7-34., (invited), Spring 2002. [pdf]

Blewitt, G., D. Lavallee, P. Clarke, and K. Nurutdinov, "A new global mode of Earth deformation: Seasonal cycle detected," Science, Vol. 294, No. 5550, pp.2,342-2,345, 2001.

• (Read the abstract here)
• (Get a free reprint from Science here)

Sanli, D.U., and G. Blewitt, "Geocentric sea level trend using GPS and >100-year tide gauge record on a postglacial rebound nodal line," Journ. Geophys. Res., Vol. 106, No. B1, p. 713, 2001. [pdf]

Taylor, G., G. Blewitt, D. Steup, S. Corbett, and A. Car, "Road Reduction Filtering for GPS-GIS Navigation," Trans. in GIS, Vol. 5(3), pp. 193-207, 2001

van Dam, T., J. Wahr, P.C.D. Milly, A.B. Shmakin, G. Blewitt, D. Lavallee, and K.M. Larson, "Crustal displacements due to continental water loading," Geophys. Res. Lett., Vol. 28, No. 4, pp. 651-654, 2001. [pdf]

Blewitt, G., Geodetic network optimization for geophysical parameters, Geophys. Res. Lett., Vol. 27, No. 22, pp. 3,615-3,618, 2000. [pdf]

Davies, P., and G. Blewitt, "Methodology for global geodetic time series estimation: A new tool for geodynamics," Journ. Geophys. Res., Vol. 105, No. B5, pp. 11,083-11,100 (2000). [pdf]

Kreemer, C. J. Haines, W.E. Holt, G. Blewitt, and D. Lavallee, "On the determination of a global strain rate model," Earth, Planets and Space, 52, 765-770, (2000). [pdf]

Taylor, G. and Blewitt, G., "Virtual differential GPS & road reduction filtering by map matching," in Proc. of ION'99, Twelfth International Technical Meeting of the Satellite Division of the Institute of Navigation, Nashville, USA, held 14-17 Sept. 1999, pp 1675-1684 (2000). [pdf]

Gregorius, T.L.H. and G. Blewitt, Modeling weather fronts to improve GPS heights: A new tool for GPS meteorology? J. Geophys. Res. Vol. 104, No. B7, p. 15,261-15,279 (1999) [pdf]

Ambrosius, B., G. Beutler, G. Blewitt, and R.E. Neilan, The Role of GPS in the WEGENER Project, Journal of Geodynamics, Vol. 25, p. 213-240 (1998) [pdf]

Blewitt, G., C. Boucher, P.B.H. Davies, M.B. Heflin, T.A. Herring, and J. Kouba, ITRF densification and continuous realization by the IGS, in Advances in Positioning and Reference Frames, Ed. by F. Bruner, International Association of Geodesy Vol. 118, p. 8-17, Springer, ISBN 3-540-64604-3 (1998).

Gregorius, T. and G. Blewitt, The effect of weather fronts on GPS Measurements, GPS World, Vol. 9, p. 52-60 (1998)

Plag, H.-P., B. Ambrosius, T. Baker, G. Beutler. G. Bianco, G. Blewitt, C. Boucher, J. Davis, J. Degnan, J. Johansson, H.-G. Kahle, I. Kumkova, I. Marson, St. Mueller, E. Pavlis, B. Richter, W. Spakman, S. K. Tatevian, P. Tomasi, P. Wilson, S. Zerbini, Scientific Objectives of Current and Future WEGENER Activities, Tectonophysics, Vol. 294, p. 117-223, (1998) [pdf]

Baker, T.F., P.L. Woodworth, G. Blewitt, C. Boucher, and G. Woppelmann, A European network for sea-level and coastal land level monitoring, Journ. of Marine Systems, Vol 13, p. 163-171 (1997) [pdf]

Blewitt, G., and Y. Bock, "Landers Earthquake: Seeing California move with Global Positioning Satellites," Geophysics News 1993, American Geophys. Union, Washington D.C. (1994). [link]

vanDam, T., G. Blewitt, and M.B. Heflin, "Atmospheric pressure loading effects on GPS coordinate determinations", Journal of. Geophysical Research, Vol. 99, No. B12, 23,939-23,950 (1994) [pdf]

Vigue, Y., S.M. Lichten, R.J. Muellerschoen, G. Blewitt, and M.B. Heflin, Improved GPS solar radiation pressure modeling for precise orbit determination, Journal of Spacecraft and Rockets, Vol. 31(5), pp. 830-833, 1994.

Blewitt, G., M.B. Heflin, K.J. Hurst, D.C. Jefferson, F.H. Webb, and J.F. Zumberge, "Absolute far-field displacements from the 28 June 1992 Landers earthquake sequence," Nature, Vol. 361, p. 340-342 (1993) [pdf]

Blewitt, G., M.B. Heflin, F.H. Webb, U.J. Lindqwister, and R. P. Malla, "Global coordinates with centimeter accuracy in the International Terrestrial Reference Frame using the Global Positioning System," Geophysical Research Letters, 19, p. 853-856 (1992) [pdf]

Lindqwister, U.J., A.P. Freedman, and G. Blewitt, "Daily estimates of the Earth's pole p. 845-848 (1992) [pdf]

Heflin, M.B., W.I. Bertiger, G. Blewitt, A.P. Freedman, K.J. Hurst, S.M. Lichten, U.J. Lindqwister, Y. Vigue, F.H. Webb, T.P. Yunck, and J.F. Zumberge, "Global geodesy using GPS without fiducial sites," Geophysical Research Letters, Vol. 19, p. 131-134 (1992) [pdf]

Vigue, Y., S.M. Lichten, G. Blewitt, M.B. Heflin, and R.P. Malla, Precise determination of the Earth's center of mass using measurements from the Global Positioning System," Geophysical Research Letters, 19, p. 1487-1490 (1992) [pdf]

Blewitt, G., "Measuring the Earth to within an inch using GPS satellites," Geophysics News 1991, p. 19-20, American Geophys. Union, Washington D.C. (1991).

Lindqwister, U.J., J.F. Zumberge, F.H. Webb, and G. Blewitt, "Few millimeter precision for baselines in the California permanent GPS geodetic array," Geophysics Research Letters., 18, p. 1135-1138 (1991) [pdf]

Blewitt, G., "An automatic editing algorithm for GPS data," Geophysical Research Letters, Vol. 17, No. 3, p. 199-202 (1990) [pdf]

Dixon, T., G. Blewitt, K. Larson, D. Agnew, B. Hager, P. Kroger, L. Skrumeda, and W. Strange, GPS measurements of regional deformation in Southern California: Some constraints on performance, Eos. Trans. AGU, Vol. 71, pp. 1051-1058 (1990)

Lindqwister, U.J., S.M. Lichten, and G. Blewitt, Precise regional baseline estimation using a priori orbital information, Geophys. Res. Lett., Vol. 17, pp. 219-222 (1990) [pdf]

Blewitt, G., "Carrier phase ambiguity resolution for the Global Positioning System applied to geodetic baselines up to 2000 km," Journal of Geophysical Research, Vol. 94, No. B8, p. 10187-10283 (1989) [pdf]

Blewitt, G., W.G. Melbourne, W.I. Bertiger, T.H. Dixon, P.M. Kroger, S.M. Lichten, T.K. Meehan, R.E. Neilan, L.L. Skrumeda, C.L. Thornton, S.C. Wu, and L.E. Young, "GPS geodesy with centimeter accuracy," in GPS Techniques Applied to Geodesy and Surveying, ed. by E. Groten and R. Strauss, p.30-40, Lecture Notes in Earth Sciences, Springer-Verlag, New York, USA, ISBN 3-540-50267-X (1988)

Seidel, S., R. Bionta, G. Blewitt, et al., Search for multitrack nucleon decay, Phys. Rev. Lett., Vol. 61(22) pp. 2522-2525, 1988.

Bionta, R., G. Blewitt, et al., Contained neutrino interactions in an underground water detector, Phys. Rev. D, Vol. 38(3), pp. 768-775, 1988.

Claus, R., S. Seidel, L. Sulak, R. Bionta, G. Blewitt, et al., A waveshifter light collector for a water Cherenkov detector, Nucl. Instrum. Meth. A., Vol. 261(3), pp. 540-542, 1987.

Bionta, R., G. Blewitt, et al., Underground search for muons correlated with Cygnus-X3, Phys. Rev. D, Vol. 36(1), pp. 30-36, 1987.

LoSecco, J., J. Vandervelde, R. Bionta, G. Blewitt, et al., Limits on the flux of energetic neutrinos from the Sun, Phys. Lett. B, Vol. 188(3), pp. 388-392, 1987.

Svoboda, R., R. Bionta, G. Blewitt, et al., An upper limit on the flux of extraterrestrial neutrinos, Astrophys. Journ., Vol. 315 (2), pp. 420-424, 1987.

LoSecco, J., R. Bionta, G. Blewitt, et al., Limits on the neutrino lifetime, Phys. Rev. D., Vol. 35(7), pp., 2073-2076, 1987.

LoSecco, J., R. Bionta, G. Blewitt, et al., Investigation of matter enhanced neutrino oscillations relevant to the solar neutrino problem, Phys. Lett. B., Vol. 184(2-3), pp. 305-308, 1987.

Bionta, R.M., G. Blewitt, et al., Observation of a neutrino burst in coincidence with Supernova 1987A in the Large Magellanic Cloud, Phys. Rev. Lett., Vol. 58, pp. 1,494-1,496 (1987)

Haines, T.J., R. Bionta, G. Blewitt, et al., Calculation of atmospheric neutrino-induced backgrounds in a nucleon-decay search, Phys. Rev. Lett., Vol. 57(16), pp. 1986-1989, 1986.

Blewitt, G., et al., Experimental limits on the free-proton lifetime for two- and three-body decay modes, Phys. Rev. Lett, Vol. 55, pp. 2,114-2,117 (1985)

Park, H.S., G. Blewitt, et al., Experimental limits on the nucleon lifetime for two- and three-body decay modes, Phys. Rev. Lett., Vol. 54, pp. 22-25 (1985)

Wuest, C. R. Bionta, G. Blewitt, et al., The IMB photomultiplier test facility, Nucl. Instrum. Meth. A., Vol. 239(3), pp. 467-486, 1985.

LoSecco J., R. Bionta, G. Blewitt, et al., Test of neutrino oscillations using atmospheric neutrinos, Phys. Rev. Lett., Vol. 54(21), pp. 2299-2301, 1985.

Park, H.S., G. Blewitt, et al., Experimental limits on monopole catalysis, nbarn oscillations, and nucleon lifetimes, Nucl. Phys. B., Vol. 252(1-2), pp. 261-275, 1985

Cortez, B., R. Bionta, G. Blewitt, et al., Search for nucleon decay into mu+k0 and vK0, Phys. Rev. Lett., Vol. 52(13), pp. 1092-1095, 1984.

Jones, T., R. Bionta, G. Blewitt, et al., Search for n-nbar oscillation in oxygen, Phys. Rev. Lett., Vol. 52(9), pp. 720723, 1984.

Sulak, L., R. Bionta, G. Blewitt, et al., The first third of a year - proton decay physics from the IMB detector, Hadronic Journ., Vol. 6(5), pp. 1391-1399, 1983.

Errede, S., J. Stone, J. Vandevelde, R. Bionta, G. Blewitt, et al., Experimental limits on magnetic monopole catalysis of nucleon decay, Phys. Rev. Lett., Vol. 51(4), pp. 245-248, 1983.

Bionta, R., G. Blewitt, et al., Search for proton decay into e+pi0, Phys. Rev. Lett., Vol. 51(1), pp. 27-30, 1983.

Conference and Workshop Proceedings and other Publications

Blewitt, G., and C. Kreemer (2007), Mega-network GPS solutions: Producing a consistent, global-scale, and high-resolution view of plate tectonic stability, rotation, and deformation, Eos Trans. AGU, Vol. 88, Fall Meet. Suppl., Abstract.

Kreemer, C., and G. Blewitt (2007), Finding and defining the edges of stable North America: Reference frame effects versus real tectonics, Eos Trans. AGU, Vol. 88, Fall Meet. Suppl., Abstract (invited).

Hammond, W.C., H.-P. Plag, G. Blewitt, and C. Kreemer, Postseismic relaxation at the Central Nevada Seismic Belt observed with vertical GPS time series, Eos Trans. AGU, Vol. 88, Fall Meet. Suppl., Abstract (invited).

Blewitt, G., and Z. Altamimi (2007), Providing a stable reference frame for observing the effect of global climate change on sea level, presented at The Global Geodetic Observing System (GGOS) Workshop (abstract, invited), Frascati, Italy.

Blewitt, G., C. Kreemer, W.C. Hammond, and H.-P. Plag (2007) Realizing the potential of GGOS for geohazard prediction and early warning, presented at The Global Geodetic Observing System (GGOS) Workshop (abstract, invited), Frascati, Italy.

Blewitt, G., C. Kreemer, W.C. Hammond, H.-P. Plag, S. Stein, E. Okal, Y. Bar-Sever, R. Gross, V. Hsu, K. Hudnut, M. Simons, T. Song, and F. Webb (2007), Toward real-time GPS for tsunami warning systems and post-earthquake damage assessment and emergency response, presented at The 3rd International Geohazards Workshop (abstract, invited), Frascati, Italy.

Gross, R.S., D.A. Lavall‚e, G. Blewitt, and P.J. Clarke (2007), Consistency of Earth rotation, gravity, and shape measurements, Abstracts of IUGG 2007, Perugia, Italy.

Plag, H.P., W. Hammond, C. Kreemer, and G. Blewitt (2007), Integrating Point and Image Geodesy: Mutual Benefits and Requirements, poster presented at The NRC Decadal Study DESDynI Science Workshop, held July 17-19, 2007, Champions Gate Florida.

Blewitt, G., C. Kreemer, W.C. Hammond, and H.-P. Plag (2007), Toward broadband exploration of tectonic-magmatic Interactions: Demonstration of self-consistent, "all-in-one" rapid analysis of GPS mega-networks using the ambizap algorithm, Abstracts of IUGG 2007, Perugia, Italy.

Hammond, W.C., C. Kreemer, and G. Blewitt (2007), Block modeling of crustal deformation in the Northern Walker Lane, western Basin and Range, to improve estimates of seismic hazard, Eos Trans. AGU, Vol. 88, Jt. Assem. Suppl., Abstract G43B-07.

Gross, R., G. Blewitt, P.J. Clarke, and D. Lavallée (2007). Low-degree surface mass loads estimated from geodetic measurements and geophysical models, Geophys. Res. Abstracts, Vol. 9, 04506.

Blewitt, G. (2007). Plate Boundary Observatory analysis using the ambizap GPS processing algorithm, EarthScope National Meeting Abstracts, p. 17, Monterey, CA.

Hammond, W.C., C. Kreemer, and G. Blewitt (2007). The Walker Lane: How complex is it? Geodetic and geologic strain in the western Basin and Range using enhanced block modeling algorithms, EarthScope National Meeting Abstracts, p. 86, Monterey, CA.

Plag, H.-P., C. Kreemer, W.C. Hammond, and Blewitt, G. (2007). Vertical motion observed with GPS: What can we learn about regional geophysical signals, Earth structure, and rheology? EarthScope National Meeting Abstracts, p. 165, Monterey, CA.

Blewitt, G., J. Price, W. Hammond, C. Kreemer, H.-P. Plag, B. Wernicke, K. Mahan, B. Guest, N. Niemi, J. Davis, S. Bisnath, and E. Malikowski, Geodetic monitoring of the Yucca Mountain region using continuous GPS measurements, NSHE Coorperative Agreement Interim Progress Briefings, Desert Research Institute, Reno (January 2007).

Blewitt, G., Z. Altamimi, J. Davis, R. Gross, C. Kuo, F. Lemoine, R. Neilan, H.P. Plag, M. Rothacher, C.K. Shum, M.G. Sideris, T. Schöne, P. Tregoning, and S. Zerbini (2006). Geodetic observations and global reference frame contributions to understanding sea level rise and variability (pp. 127-143). Paris: Understanding Sea-level Rise and Variability, A World Climate Research Programme Workshop and a WCRP contribution to the Global Earth Observation System of Systems, World Climate Research Program.

Clarke, P., D.A. Lavallée, G. Blewitt, and T.M. Van Dam (2006). Consistent and Accurate Representation of Surface Mass Loading Using Modified Basis Functions, Eos Trans. AGU, 87(52), Fall Meet. Suppl., Abstract G33B-0056.

Kreemer, C., W.C. Hammond, G. Blewitt (2006). On the motion and geometry of the Sierra Nevada – Great Valley micro-plate: Implications for Walker Lane tectonics, Eos Trans. AGU, 87(52), Fall Meet. Suppl., Abstract G42A-05 INVITED.

Kreemer, C., D.A. Lavallée, G. Blewitt, and W.E. Holt (2006). On the stability of a geodetic no-net rotation frame, effects of frame translation, and implications for the ITRF, Eos Trans. AGU, 87(52), Fall Meet. Suppl., Abstract G33C-04 INVITED.

Hammond, W.C., Z. Li, H.-P. Plag, G. Blewitt, and C. Kreemer (2006). Results of InSAR and GPS measurement of tectonic deformation of the Eastern California Shear Zone and Yucca Mountain, Nevada", Eos Trans. AGU, 87(52), Fall Meet. Suppl., Abstract G53D-0931.

Blewitt, G. (2006). The fixed point theorem of ambiguity resolution for precise point positioning of GPS networks: Theory and applications, Eos Trans. AGU, 87(52), Fall Meet. Suppl., Abstract G43A-0977.

Plag, H.P., W.C. Hammond, G. Blewitt, and C. Kreemer (2006). Vertical motion observed With GPS and InSAR in Nevada: What can we learn about geophysical signals, Earth Structure, and Rheology?, Eos Trans. AGU, 87(52), Fall Meet. Suppl., Abstract G21A-06.

Blewitt, G., C. Kreemer, W.C. Hammond, H.-P. Plag, Rapid determination of earthquake magnitude using GPS for tsunami warning systems: An opportunity for IGS to make a difference", United States-Japan Cooperative Program in Natural Resources, Tokyo, Japan. (November 2006).

Kreemer, C., D. Lavallée, G. Blewitt, and W.C. Holt. Constraining no-net rotation of the Terrestrial Reference Frame, International Association of Geodesy, Geodetic Reference Frames 2006 Symposium, Munich (October 2006).

Plag, H.-P., C. Kreemer, D. Lavallée and G. Blewitt, Geodetic Reference Frames 2006 Symposium, Academic, Reducing global reference frame uncertainties by geophysical models, International Association of Geodesy, Geodetic Reference Frames 2006 Symposium, Munich (October 2006).

Craymer, M., G. Blewitt, D. Argus, Y. Bock, E. Calais, J. Davis, M. Tamisiea, T. Herring, G. Sella, and R. Snay, SNARF 1.0: An ITRF-based regional reference frame for North America, International Association of Geodesy, Geodetic Reference Frames 2006 Symposium, Munich (October 2006).

Shevenell, L., M. Coolbaugh, J. Faulds, G. Oppliger, J. Louie, G. Blewitt, C. Kratt, J. Bell, Update of Great Basin Center for Geothermal Energy activities, Geothermal Resources Council, San Diego. (September 2006).

Kreemer, C., G. Blewitt, and W.C. Hammond, Using geodesy to explore correlations between crustal deformation characteristics and geothermal resources, Geothermal Resources Council, San Diego. (September 2006).

Blewitt, G., C. Kreemer, W.C. Hammond, H.-P. Plag, Rapid determination of earthquake magnitude using GPS for tsunami warning systems: Required accuracy of real-time GPS satellite orbits, COSPAR meeting, Beijing, China. (July 2006).

Blewitt, G., C. Kreemer, W.C. Hammond, H.-P. Plag, S. Stein, and E. Okal (2006). Rapid determination of earthquake magnitude using GPS for tsunami warning systems, Eos Trans. AGU, 87(36) West Pac. Geophys. Meet. Suppl., Abstract U22A-05.

Shevenell, L.A., M. Coolbaugh, J. Faulds, G. Oppliger, J. Louie, G. Blewitt, C. Kratt, J. Bell, Update of the activities of the Great Basin Center for Geothermal Energy, American Chemical Society, Sparks. (June 2006).

Blewitt, G., C. Kreemer, W.C. Hammond, H.-P. Plag, S. Stein, and E. Okal, Rapid determination of earthquake magnitude using GPS: A role for space geodesy in tsunami warning, GEO SE Asia Geohazards Workshop, Kuala Lumpur. (June 2006).

Shevenell, L.A., M. Coolbaugh, J. Faulds, G. Oppliger, J. Louie, G. Blewitt, C. Kratt, J. Bell, Summary of research projects at the Great Basin Center for Geothermal Energy, Society of Independent Professional Earth Scientists, South Lake Tahoe. (June 2006).

Blewitt, G., Yucca GPS Analysis, DOE Yucca Mountain Project, Summerlin. (June 2006).

Blewitt, G., C. Kreemer, W.C. Hammond, H.-P. Plag, S. Stein, and E. Okal, Rapid Determination of Earthquake Magnitude using GPS for Tsunami Warning Systems, poster presented at Understanding Sea Level Rise and Variability, UNESCO, Paris. (June 2006).

Blewitt, G. and Z. Altamimi, Regional and global measurements: The reference frame for understanding observations, presented at Understanding Sea Level Rise and Variability, UNESCO, Paris. (June 2006).

Blewitt, G., J. Dow, and C. Rizos, Preparing the IGS strategic plan 2008-2012: Solicitation of ideas on the future needs of scientific and other users, International GPS Service Workshop, European Space Agency, Darmstadt, Germany. (May 2006).

Blewitt, G., C. Kreemer, W.C. Hammond, H.-P. Plag, S. Stein, and E. Okal, Rapid determination of earthquake magnitude using GPS for tsunami warning systems: An opportunity for IGS to make a difference, International GPS Service Workshop, European Space Agency, Darmstadt, Germany. (May 2006).

Blewitt, G., Rapid determination of earthquake magnitude using GPS for tsunami warning systems, seminar presented at University College, London, UK. (April 2006).

Blewitt, G., Rapid determination of earthquake magnitude using GPS for tsunami warning systems, seminar presented at California Institute of Technology, Pasadena. (April 2006).

Blewitt, G., Rapid determination of earthquake magnitude using GPS for tsunami warning systems, seminar presented at NASA Jet Propulsion Laboratory, JPL, Pasadena. (April 2006).

Blewitt, G., Rapid determination of earthquake magnitude using GPS for tsunami warning systems, seminar presented at University of Newcastle upon Tyne, Newcastle upon Tyne, UK. (April 2006).

Blewitt, G., C. Kreemer, W.C. Hammond, H.-P. Plag, S. Stein, and E. Okal, Rapid determination of earthquake magnitude using GPS for tsunami warning systems, USGS Tsunami Sources Workshop, Menlo Park. (April 2006).

Lavallée, D., G. Blewitt, P. Clarke, P. Moore, T. van Dam, and Q. Zhang, (2006). The terrestrial reference frame and surface mass loading, Geophys. Res. Abs., Vol. 8, 07154.

Blewitt, G., C. Kreemer, W. Hammond, H.-P. Plag, S. Stein, and E. Okal (2006), Rapid determination of earthquake magnitude using GPS for tsunami warning systems, Geophys. Res. Abstracts, Vol. 8, 09528.

Blewitt, G., Hammond, W.C., Kreemer, C.W., and Plag, H.P., GPS at Slide Mountain, EarthScope's Plate Boundary Observatory Extension Working Group Meeting, Reno. (March 2006).

Blewitt, G., C. Kreemer, W.C. Hammond, H.-P. Plag, S. Stein, and E. Okal, Rapid determination of earthquake magnitude using GPS for tsunami warning systems", UNAVCO Science Meeting, Denver. (March 2006).

Hammond, W.C., G. Blewitt, C. Kreemer, H.-P. Plag, J.G. Anderson, K. Smith, Recent seismicity and surface deformation at Lake Tahoe: An update on lower crustal magma movement, UNAVCO Science Meeting, Denver. (March 2006).

Blewitt, G., W.C. Hammond, C. Kreemer, and H.-P. Plag, Nevada Earthquake Response GPS Network (NEARNET), Eos Trans. AGU, 86(52), Fall Meet. Suppl., Abstract G11A-1182, 2005.

Blewitt, G., H.-P. Plag, C. Kreemer, W.C. Hammond, and V.V. Titov, Effects of the Mw 9.0 Sumatra earthquake and tsunami on Earth's shape, Eos Trans. AGU, 86(18), Jt. Assem. Suppl., Abstract U52A-01 INVITED, 2005.

Blewitt, G., W.C. Hammond, C. Kreemer, and H.-P. Plag, From Yucca Mountain local stability to global quaking: GPS point-positioning strategies spanning the spatio-temporal spectrum, COMET- Advances in GPS Data Processing and Modeling for Geodynamics, University of London, KEYNOTE ADDRESS, 9-10 November, 2005.

Blewitt, G., W.C. Hammond, and C. Kreemer Targeting of Potential Geothermal Resources in the Great Basin from Relationships between Geodetic Strain and Geological Structures, DOE Geothermal Technologies Program Peer Review Meeting, July 26-28, 2005.

Blewitt, G., The Great Sumatra Earthquakes of 26 December 2004 and 28 March 2005: Results from GPS Geodesy, Center for Observation and Modeling of Earthquakes and Tectonics Seminar Series, University College London, INVITED, 17 June 2005.

Blewitt, G., The Great Sumatra Earthquakes of 26 December 2004 and 28 March 2005: Results from GPS Geodesy, Center for Observation and Modeling of Earthquakes and Tectonics Seminar Series, Geomatics Seminar Series, University of Newcastle, INVITED, 17 June 2005.

Blewitt, G., Yucca GPS analysis update, presented at Department of Energy Yucca Mountain Project Meeting, Summerlin, NV, May 2005.

Blewitt, G., Workshops for Establishing a Stable North American Reference Frame (SNARF) to Enable Geophysical and Geodetic Studies with EarthScope: Annual Report 2004-2005, Abstracts of the 2005 EarthScope National Meeting, p. 81, 2005.

Coolbaugh, M.F., G. Blewitt, J.E. Faulds, and C. Kreemer, Regional and Local Controls on the Distribution of Geothermal Systems in the Great Basin, Western United States, os Trans. AGU, 86(52), Fall Meet. Suppl., Abstract T22A-01, INVITED, 2005.

Lavallee, D.A., T. Van Dam, G. Blewitt, P.J. Clarke, P. Moore, and Q. Zhang, Geocenter Motions From Satellite Geodesy; A Unified Observation Model, Eos Trans. AGU, 86(52), Fall Meet. Suppl., Abstract G31A-01, INVITED, 2005.

Kreemer, C., G. Blewitt, W.C. Hammond, and H.-P. Plag, Constraints on Postseismic Deformation Processes After the December 2004 and March 2005 Sumatra Earthquakes From Continuous GPS Observations, Eos Trans. AGU, 86(52), Fall Meet. Suppl., Abstract U11A-0825, 2005.

Hammond, W.C., G. Blewitt, and C. Kreemer, The edges of extension: Boundaries of the Basin and Range Province as natural laboratories for studying tectonic and structural processes, Geological Society of America Meeting, Abstract T144, Utah, Oct. 2005.

Blewitt, G., W.C. Hammond, C. Kreemer, Relating Geothermal Resources to Great Basin Tectonics using GPS, Geothermal Resources Council Transactions, v. 29 (2005)

Shevenell, L., M. Coolbaugh, J. Faulds, G. Oppliger, W. Calvin, J. Louie, G. Blewitt, C. Kratt, L. Garside, G. Arehart, C. Sladek, and P. Lechler, Geothermal Resources Council Transactions, v. 29 (2005)

Blewitt G., D. Argus, R. Bennett, Y. Bock, E. Calais, M. Craymer, J. Davis, T. Dixon, J. Freymueller, T. Herring, D. Johnson, K. Larson, M. Miller, G. Sella, R. Snay, and M. Tamisiea, A Stable North American Reference Frame (SNARF): First Release, Abstracts of the 2005 IRIS/UNAVCO Joint Workshop, 2005.

Blewitt, G., C. Kreemer, H.-P. Plag, and W. Hammond, GPS Strong Motion at a Various Time Scales from the Great Sumatra Earthquakes: Clues to Puzzling Phenomena, Abstracts of the 2005 IRIS/UNAVCO Joint Workshop, 2005.

Hammond, W.C., G. Blewitt, and C. Kreemer, First MAGNET Results: Site and Network Performance Assessment and Future Prospects for Estimating Slip Rates on Western Basin and Range Faults, Abstracts of the 2005 IRIS/UNAVCO Joint Workshop, 2005.

Blewitt, G., H.-P. Plag, C. Kreemer, W.C. Hammond, and V.V. Titov, Effects of the Mw 9.0 Sumatra earthquake and tsunami on Earth's shape, Eos Trans. AGU, 86(18), Jt. Assem. Suppl., Abstract U52A-01 INVITED, 2005.

Blewitt G., H.-P. Plag, C. Kreemer, W.C. Hammond, R. Gross, P. Clarke, D. Lavallée, and T. van Dam, Monitoring Sea Level Change: Reference Frames, Earth’s Changing Shape & Gravity Field, NASA Sea Level Workshop, NASA Goddard Space Flight Center, Apr. 11-12, 2005.

Blewitt, G., H.-P. Plag, C. Kreemer, W.C. Hammond, Effects of the Mw 9.0 Sumatra earthquake and tsunami on Earth's shape, Seismological Society of America Annual Meeting Abstracts, 2005.

Hammond, W.C., G. Blewitt, and C. Kreemer, Geodetic contraints on the rate and style of contemporary deformation in the northern Walker Lane, Seismological Society of America Annual Meeting Abstracts, 2005.

Smith, K.D., G. Blewitt, D. Von Seggern, L. Preston, and J. Anderson, Sierran uplift and lower crustal earthquake swarm: Evidence for magma injection beneath north Lake Tahoe, Nevada-California in late 2003, Seismological Society of America Annual Meeting Abstracts, 2005.

Blewitt, G., How to catch geology in action using GPS, Geological Society of Nevada Newsletter, Vol. 20 (3), p. 3, 2005. [abstract pdf].

Plag, H.-P., T. van Dam, G. Blewitt, H.P. Kierulf, A proposal for a consistent model of air pressure loading as part of the International Terrestrial Reference System (ITRS) Conventions, Geophysical Research Abstracts, Vol. 7, 10113, 2005 [abstract pdf].

Plag, H.-P., G. Blewitt, G., C. Kreemer, W.C. Hammond, V. Titov, Effects of the Mw 9.0 Sumatra earthquake and tsunami on Earth's shape, Geophysical Research Abstracts, Vol. 7, 10129, 2005 [abstract pdf]

Kreemer, C., G. Blewitt, G., H.-P. Plag, and W.E. Holt, On the stability of the no-net-rotation frame realization, Geophysical Research Abstracts, Vol. 7, 10006, INVITED, 2005 [abstract pdf]

Blewitt, G., Workshops for Establishing a Stable North American Reference Frame (SNARF) to Enable Geophysical and Geodetic Studies with EarthScope: Annual Report 2004-2005, Abstracts of the 2005 EarthScope National Meeting, p. 81, 2005. [abstract pdf]. [presentation ppt].

Hammond, W.C., C. Kreemer, and G. Blewitt. Understanding Northwest Basin and Range Tectonics, from the Northern Walker Lane to the Central Nevada Seismic Belt, Using EarthScope Data, Abstracts of the 2005 EarthScope National Meeting, p. 138, 2005. [abstract pdf]

Kreemer, C., W.C. Hammond, and G. Blewitt. A Pre-PBO Strain Rate Model for the Great Basin, Abstracts of the 2005 EarthScope National Meeting, p. 172, 2005. [abstract pdf].

Blewitt, G., Lower crustal transients and surface mass transport: Time series filtering for signal detection at two spatial extremes, Eos Trans., AGU 85(47), Fall Meet. Suppl., Abstract G51D-02 INVITED, 2004.

Gross, R. S., G. Blewitt, P. Clarke, and D. Lavallee, Degree-2 Harmonics of the Earth’s Mass Load Estimated from GRACE, GPS, and Earth Rotation Data, Joint CHAMP/GRACE Science Meeting, Potsdam, Germany, 2004.

Blewitt, G., K.D. Smith, and D. von Seggern, Moving mountains and deep crustal earthquakes: Evidence for deep magma injection beneath Lake Tahoe, Nevada-California, Eos Trans., AGU 85(47), Fall Meet. Suppl., Abstract G43C-01 INVITED, 2004.

Clarke, P.J., D.A. Lavallee, G. Blewitt, and T. van Dam, Choice of basis functions for the representation of seasonal surface loading signals in geodetic time series, Eos Trans., AGU 85(47), Fall Meet. Suppl., Abstract G53A-0121, 2004.

Lavallee, D.A., T. van Dam, G. Blewitt, and P.J. Clarke, Estimating geocenter motions from GPS measurements, Eos Trans., AGU 85(47), Fall Meet. Suppl., Abstract G34A-02, 2004.

Hammond, W.C., W. Thatcher, and G. Blewitt, Crustal deformation across the Sierra Nevada-northern Walker Lane, Basin and Range transition, Western United States measured with GPS, 2000-2004, Eos Trans., AGU 85(47), Fall Meet. Suppl., Abstract G31D-07, 2004.

Haakonsen, T.A., H. Plag, H. P. Kierulf, and G. Blewitt, Improving reference frame stability by modeling common modes of surface displacements using empirical orthogonal functions, Eos Trans., AGU 85(47), Fall Meet. Suppl., Abstract G21B-03, 2004.

Kreemer, C., G. Blewitt, W.C. Hammond, and M.F. Coolbaugh, A new strain rate model for the Great Basin and its application to tectonic and geodynamic studies, Eos Trans., AGU 85(47), Fall Meet. Suppl., Abstract G31D-06 INVITED, 2004.

Hill, E., and G. Blewitt, Spatial variations in strain inferred by GPS across the Yucca Mountain region, southern Nevada, Eos Trans., AGU 85(47), Fall Meet. Suppl., Abstract G21A-0124, 2004.

Faulds, J.E., M. Coolbaugh, G. Blewitt, and C.D. Henry, Why is Nevada in hot water? Structural controls and tectonic model of geothermal systems in the northwestern Great Basin: Geothermal Resources Council Transactions, p. 649-654., 2004. [abstract]

Shevenell, L., M. Coolbaugh, J. Faulds, G. Oppliger, W. Calvin, J. Louie, G. Blewitt, C. Kratt, G. Arehart, C. Sladek, P. Lechler, and L. Garside, Accomplishments at the Great Basin Center for Geothermal Energy. Geothermal Resources Council Transactions, v. 28: 47-52, 2004.

Bell, J.W., F. Amelung, T.J. Burbey, and G. Blewitt, INSAR and GPS applications in aquifer deformation and subsidence studies, Geological Society of America, Abstracts with Programs, Vol.36, No. 5, p. 299, 2004.

Blewitt, G., M. Coolbaugh, W. Holt, R. Bennett, J. Davis, A map of current tensor strain rate in the Basin and Range from GPS, EarthScope GreatBREAK Workshop Abstracts, Tahoe City, California, held June 21-23, 2004. [link]

Coolbaugh, M.F., J. Faulds, G. Blewitt, C. Henry, Geothermal Activity: Another clude for unraveling recent Great Basin tectonics, EarthScope GreatBREAK Workshop Abstracts, Tahoe City, California, held June 21-23, 2004. [link]

Faulds, J., C. Henry, G. Blewitt, M. Coolbaugh, The northern Walker Lane, northwestern Great Basin: A youthful part of the North American-Pacific transform margin, EarthScope GreatBREAK Workshop Abstracts, Tahoe City, California, held June 21-23, 2004. [link]

Blewitt, G., P. Clarke, D. Lavallee, R. Gross, K. Nurutdinov, T. van Dam, GPS as a global sensor of system Earth: Status and future prospects, Eos Trans. AGU, 85(17), Jt. Assem. Suppl., Abstract G43C-03 INVITED, 2004.

Blewitt, G., R. Bennett, E. Calais, T. Herring, K. Larson, M. Miller, G. Sella, R. Snay, and M. Tamisiea, First report of the Stable North America Reference Frame (SNARF) Working Group, Eos Trans. AGU, 85(17), Jt. Assem. Suppl., Abstract G21C-01, 2004.

Blewitt, G., P. Clarke, D. Lavallée, R. Gross, K. Nurutdinov, and T. van Dam, Relationahips between surface mass, station position, geocenter, & Earth rotation: IGS GNAAC results, IGS Workshop & Symposium Abstracts, p. 38, University of Berne, Switzerland, held March 01-05, 2004.

Blewitt G., K. Larson K, R. Bennett, E. Calais, M. Craymer, T. Herring, M. Miller, G. Sella, R. Snay, and M. Tamisiea, First report of the Stable North America Reference Frame (SNARF) Working Group, Abstracts of the UNAVCO 2004 Annual Meeting, p. 21, Boulder, Colorado, held Feb 25-27,2004.

Blewitt G., Loading effects and reference frame definition, Abstracts of the UNAVCO 2004 Annual Meeting, (invited plenary talk) p. 22, Boulder, Colorado, held Feb 25-27,2004.

Blewitt G., Semi-permanent GPS station design for high resolution, high accuracy strain monitoring in the Basin and Range, Abstracts of the UNAVCO 2004 Annual Meeting, p. 23, Boulder, Colorado, held Feb 25-27,2004.

Blewitt, G., A reference frame for PBO: What do we have; what do we need? Eos Trans. AGU, 84(46), Fall Meet. Suppl., Abstract G32B-02 INVITED, 2003

Blewitt, G., T. Burbey, J. Bell, S. Warner, E. Hill, Aquifer deformation in the Virgin River Valley, Nevada: GPS sensitivity to deformation over various time and distance scales, Eos Trans. AGU, 84(46), Fall Meet. Suppl., Abstract G42A- 41, 2003

Lavallee, D., G. Blewitt, P. Clarke, and T. van Dam, Seasonal variation in the spatial distribution of surface mass estimated using GPS, Eos Trans. AGU, 84 (46), Fall Meet. Suppl., Abstract G51C-02 INVITED, 2003

Warner, S., T. Burbey, G. Blewitt, J. Bell, E. Hill, and M. Johnson, Using GPS to quantify three dimensional storage and aquifer deformation in the Virgin River Valley, Nevada, Eos Trans. AGU, 84(46), Fall Meet. Suppl., Abstract G41A- 03, 2003

Gross, R, G. Blewitt, P. Clarke, and D. Lavallee, Mass loads, surface deformation, and the Earth's Rotation, Eos Trans. AGU, 84(46), Fall Meet. Suppl., Abstract G51C-05 INVITED, 2003

Clarke, P. G. Blewitt, D. Lavallee, E. Pavlis, Comparison of geometric and gravimetric estimates of surface mass tranfer: Constraints on geocenter motion and low-degree Love numbers, Eos Trans. AGU, 84(46), Fall Meet. Suppl., Abstract G21A-04 INVITED, 2003

Clarke, P. G. Blewitt, D. Lavallee, T. van Dam, and J. Wahr, Applying surface load models to GPS coordinates: The effects of mass conservation and gravitational consistency, Eos Trans. AGU, 84(46), Fall Meet. Suppl., Abstract G41C-02 INVITED, 2003

Blewitt, G., M. Coolbaugh, W. Holt, C. Kreemer, J. Davis, and R. Bennett, 2003, Targeting of potential geothermal resources in the Great Basin from regional- to basin-scale relationships between geodetic strain and geological structures, Transactions Geothermal Resources Council, Vol. 27, p. 3-7, 2003.

Coolbaugh, M., D. Sawatsky, G. Oppliger, T. Minor, G. Raines, L. Shevenell, G. Blewitt, and J. Louie, Geothermal GIS coverage of the Great Basin, USA: Defining regional controls and favorable exploration terrains, Department of Energy Geothermal Program Review Reports, Vol. 27, p. 9-14, 2003.

Blewitt, G., M. Coolbaugh, W. Holt, C. Kreemer, J. Davis, and R. Bennett, Targeting of potential geothermal resources in the Great Basin from regional- to basin-scale relationships between geodetic strain and geological structures, Department of Energy Geothermal Technologies Program Peer Review Reports, Golden, Colorado, July 2003.

Price, J., G. Blewitt, B. Wernicke, J. Davis, Geodetic monitoring of the Yucca Mountain Region, Department of Energy Yucca Mountain Project Final Report, 2003.

Bell, J.W., and G. Blewitt, Annual Report, 5 March-31 December 2002, NASA Research Grant 13-02017, Development and Transfer of InSAR and GPS Applications to Local Government in Nevada: Groundwater Management and Land Subsidence Mitigation, 2003.

Blewitt, G., J. Louie, M. Coolbaugh, D. Sawatsky, W. Holt, J.Davis, and R. Bennett, Potential for geothermal exploration using EarthScope seismic and GPS data, Joint IRIS-UNAVCO Workshop Abstracts, 2003.

Blewitt, G., Fundamental ambiguity in the definition of vertical motion, Abstract, European Center for Geodynamics and Seismology Workshop "The State of GPS Vertical Positioning Precision: Separation of Earth Processes by Space Geodesy, held in Luxembourg, March 31-April 4, 2003.

Blewitt, G., Clarke, P.J., D. Lavallee, and K. Nurutdinov, Toward grand unified geodesy: Aspects of self-consistency between surface loading deformation, reference frames, geocenter motion, Earth rotation, the time-variable geoid, and sea level, Geophys. Res. Abstracts (invited), Vol. 5, 004458, Eur. Geophys. Soc., held in Nice, France, April 6-11, 2003.

Blewitt, G., Clarke, P.J., D. Lavallee, and K. Nurutdinov, Earth's changing shape and the seasonal water cycle: Direct estimation of low-degree spherical harmonic loading coefficients, Geophys. Res. Abstracts (invited), Vol. 5, 004475, Eur. Geophys. Soc., held in Nice, France, April 6-11, 2003.

Blewitt, G., Clarke, P.J., D. Lavallee, and K. Nurutdinov, Application of Clebsch-Gordan coefficients and isomorphic frame transformations to invert Earth's changing geometrical shape for continental hydrological loading and sea level's passive response, Abstract, International Union of Geodesy and Geophysics General Assembly, "State of the Planet: Frontiers and Challenges", held in Sapporo, Japan, 30 June - 11 July, 2003.

Blewitt, G., GPS, the interdisciplinary chameleon: how does it do that? Eos, Trans. AGU, Vol. 83(47), Fall Meeting Suppl., Invited Abstract U11A-03 (also webcast by agu.org), p.1, 2002 [movie] (requires QuickTime in browser)

Blewitt, G., and P. Clarke, Inversion of solid Earth's varying shape 2: Using self-consistency to infer static ocean topography, Eos. Trans. AGU, Vol. 83(47), Fall Meeting Suppl., Abstract G11A-02, p.370, 2002.

Simpson, D., G. Blewitt, G. Ekstrom, W. Prescott, T. Henyey, M. Zoback, 2002, Moving closer to EarthScope: A major new initiative for the Earth sciences, Eos. Trans. AGU, Vol. 83(47), Fall Meeting Suppl., Abstract T72E-01, p.1328, 2002.

Clarke, P., and G. Blewitt, Inversion of solid Earth's varying shape 1: Global mean sea level variations, Eos. Trans. AGU, Vol. 83(47), Fall Meeting Suppl., Abstract G11A-01, p.370, 2002.

Lavallee, D., and G. Blewitt, Degree-1 Earth deformation from very long baseline interferometry, Eos. Trans. AGU, Vol. 83(47), Fall Meeting Suppl., Abstract G11A-03, p.371, 2002.

Hill, E., R. Bennett, G. Blewitt, J. Davis, and B. Wernicke, Sub-millimeter signal detection by GPS: Cross validation using GIPSY and GAMIT solutions for the Yucca Mountain network, Eos. Trans. AGU, Vol. 83(47), Fall Meeting Suppl., Abstract G22A-13, p.381, 2002.

Blewitt, G., M. Coolbaugh, W. Holt, C. Kreemer, J. Davis, and R. Bennett, Targeting of potential geothermal resources in the Great Basin from regional relationships between geodetic strain and geological structures, Transactions Geothermal Resources Council, Vol. 26, p. 523-526, 2002. [pdf]

Blewitt, G., and D. Lavallee, Bias in Geodetic Site Velocity due to Annual Signals: Theory and Assessment, Symposia Proceedings, International Association of Geodesy, held in Budapest, Sept. 2001.

Lavallee, D., G. Blewitt, P.J. Clarke, K. Nurutdinov, W.E. Holt, C. Kreemer, C.M. Meertens, W.S. Shiver, Seth Stein, Susanna Zerbini, Luisa Bastos, H-G. Kahle, GPSVEL Project: Towards a Dense Global GPS Velocity Field, Extended Abstracts of the International Assocation of Geodesy, held in Budapest, Sept. 2001.

Bell, J., G. Blewitt, and F. Amelung, Las Vegas Valley Subsidence Report, Nevada Bureau of Mines and Geology Open-File Report 01-5, 45 pp. plus color plates, 2001.

Blewitt G., D. Lavallee, P.J. Clarke, K. Nurutdinov, Earth's shape reveals seasonal pattern of surface mass circulation, Abstracts of the International Assocation of Geodesy, held in Budapest, Sept. 2001.

Blewitt G., Optimizing geodetic network design for deformation model parameters, Abstracts of the International Assocation of Geodesy, held in Budapest, Sept. 2001.

Blewitt G., D. Lavallee, P.J. Clarke, K. Nurutdinov, W.E. Holt, C. Kreemer, C.M. Meertens, W.S. Shiver, Seth Stein, Susanna Zerbini, Luisa Bastos, H-G. Kahle, GPSVEL Project: Towards a Dense Global GPS Velocity Field, Abstracts of the International Assocation of Geodesy, held in Budapest, Sept. 2001.

Blewitt, G., D. Lavallee, P. Clarke, and K. Nurutdinov, A new global mode of Earth deformation: Reference frame implications, Eos Trans., AGU, Vol. 82(47), Fall Meeting Suppl., Invited Abstract G32A-07, p. 277, 2001

Blewitt, G., D. Lavallee, P. Clarke, and K. Nurutdinov, A new global mode of Earth deformation forced by seasonal mass redistribution, Eos Trans., AGU, Vol. 82(47), Fall Meeting Suppl., Abstract G42A-04, p. 288, 2001.

Edwards, S., P. Clarke, G. Blewitt, G. Wadge, P. Webley, R. Bingley, A. Dodson, and S. Waugh, GPS tropospheric modeling for SAR interferometry: are small GPS networks useful? Eos Trans., AGU, Vol. 82(47), Fall Meeting Suppl., Abstract G22C-0232, p. 261, 2001.

Blewitt G., D. Lavallee, P. Clarke, and K. Nurutdinov, Degree one harmonic deformations weight interhemispheric mass transport: a new method for determining geocenter variations, Eos Trans., AGU, Vol. 82(20), Spring Meeting Suppl., Abstract U52A-04, p. 19, 2001.

Holt, W., Haines, A..J., and Blewitt, G., "Global Strain Rate Map, in International Lithosphere Program Annual Report - 1999," Report 24, pub. by ILP Secretariat, Potsdam, Germany, pp. 20-21., 2000.

Blewitt, G., Clarke, P., and Lavallee D., Spatially coherent oscillations in longitude and latitude linked to seasonal variation in Earth's shape, Eos Trans. AGU, Vol. 81(48), Fall Meeting Suppl., Abstract G11C-05, p. 332, 2000.

Briggs, R., Wesnousky, S., and Blewitt, G., 2000, A geologic and geodetic investigation of the Pyramid Lake and Olinghouse Fault zones, Northern Walker Lane, Nevada, Eos Trans. AGU, Vol. 81(48), Fall Meeting Suppl., Abstract T22A-09, p.1230, 2000.

Lavallee, D., and G. Blewitt, Constraints on integrated deformation across major plate boundaries from the IGS Densification Project, Eos Trans. AGU, Vol. 81(19), Spring Meeting Suppl., Abstract T21A-03, p. 406, 2000.

Anderson, J., G. Blewitt, S. Wesnousky, J. Brune, J. Faulds, C. Henry, J. Louie, W. Holt, and W. Thatcher, "Tectonics of the Northern Walker Lane," in The Plate Boundary Observatory: Creating a Four-Dimensional Image of the Deformation of Western North America, held in Palm Springs, Calif., Oct. 29-Nov. 1 2000, pp. 4-1 to 4-5 (2000).

G. Blewitt, and R. Bennett, Measurement of rates of deformation across the Rio Grande Rift and rotation of the Colorado plateau," in The Plate Boundary Obseratory: Creating a Four-Dimensional Image of the Deformation of Western North America, held in Palm Springs, Calif., Oct. 29-Nov. 1 2000, pp. 4-25 to 4-30 (2000).

Davis, J.L., R.A. Bennett, and G. Blewitt, "A distributed organizational structure for PBO network operations and data analyses," in The Plate Boundary Obseratory: Creating a Four-Dimensional Image of the Deformation of Western North America, held in Palm Springs, Calif., Oct. 29-Nov. 1 2000, pp. OA-2 to OA-6 (2000).

Blewitt, G., D. Lavallee, P. Clarke, D. Nurutdinov, W. Holt, C. Kreemer, C. Meertens, W. Shiver, and S. Stein, "GPSVEL Project: Towards a dense global GPS velocity field," Bulletin of the Royal Naval Observatory, San Fernando, Spain, No. 3/2000 ISSN 1131-5040 (2000).

Blewitt, G., and D. Lavallee, "Effect of annually repeating signals on velocity estimates," Bulletin of the Royal Naval Observatory, San Fernando, Spain, No. 3/2000 ISSN 1131-5040 (2000).

vanDam, T., J. Wahr, C. Milly, A Smakin, G. Blewitt, and D. Lavallee, "Long wavelength hydrological loading: Predicted effects on GPS vertical measurements," Bulletin of the Royal Naval Observatory, San Fernando, Spain, No. 3/2000 ISSN 1131-5040 (2000).

Sanli, D.U., and G. Blewitt, "Geocentric sea level trend using GPS and a >100-yr tide gauge record on a post glacial rebound nodal line," Bulletin of the Royal Naval Observatory, San Fernando, Spain, No. 3/2000 ISSN 1131-5040 (2000).

Taylor, G., and Blewitt, G., Road Reduction Filtering using GPS, Proceedings of 3rd AGILE Conference on Geographic Information Science, Helsinki, Finland, pp 114-120. (2000)

Van Dam, T.M., Blewitt, G., Larson, K., Lavallee, D., Wahr, J., Milley, C., Shmakin, A., Investigating the elastic load response of the Earth using environmental loading forcing and GPS data, Eos Trans. AGU, Vol. 80(46), Fall Meeting Suppl., Abstract G12B-14, p. 249, 1999.

Blewitt, G., van Dam, T., Lavallee, D., and Brondeel, M., Atmospheric loading signals detected by IGS densification project, Eos Trans. AGU, Vol. 80(17), Spring Meeting Suppl., Abstract G31A-06, p. 79, 1999.

Blewitt, G., and Lavallee, D., Constraints on integrated deformation across major plate boundaries from the IGS Densification Project, Abstracts of the International Symposium on GPS: Application to Earth Sciences and Interaction with other Space Geodetic Techniques, Tsukuba, Japan, 1999.

Kreemer, C. Holt, W.E., Blewitt, G., and Haines, J., A self-consistent global strain rate field inferred from space geodetic techniques and seismic moment tensors, Abstracts of the International Symposium on GPS: Application to Earth Sciences and Interaction with other Space Geodetic Techniques, Tsukuba, Japan, 1999.

Blewitt, G., R. Kawar, M. Pearlman, and P. Wilson, Report on the Working Group for Geodynamics Studies of the Greater Middle East, in WEGENER 98 Book of Extended Abstracts, p. 51-54, Ed. Plag H.P., Statens Kartverk, Honnefoss, Norway, ISBN 82-90408-76-5 (1998)

Sanli, U.D., and G. Blewitt, Testing the stability of a 100-yr tide gauge using absolute and relative GPS to separate regional versus local effects, Eos Trans. AGU, Vol. 79(45), Fall Meeting Suppl., Abstract G71B-08, p. 182, 1998.

Blewitt, G., and D. Lavallee, GPS investigation of plate motions: results from the IGS ITRF densification project, Eos Trans. AGU, Vol. 79(45), Fall Meeting Suppl., Abstract G42A-06, p. 217, 1998.

Kouba, J., G. Blewitt, C. Meertens, and F. Webb, IGS combined products, their use and IGS realization of International Terrestrial Reference Frame (ITRF), in WEGENER 98 Book of Extended Abstracts, p. 121-125, Ed. Plag H.P., Statens Kartverk, Honnefoss, Norway, ISBN 82-90408-76-5 (1998).

Blewitt, G., R.S. Kawar and P.B.H. Davies, Globally consistent rigid plate motion: fiducial-free Euler vector estimation, in Proc. of IGS Analysis Center Workshop, Ed. John Dow, ESOC, Darmstadt, Germany (1998)

Sanli, D.U. and G. Blewitt, Monitoring tide gauges using different GPS strategies and experiment designs, in Methods for Monitoring Sea Level, GPS and Tide Gauge Benchmark Monitoring, GPS Altimeter Calibration, Jet Propulsion Laboratory, Pasadena, Calif. USA (1998)

Blewitt, G., P.B.H. Davies, T.Gregorius, R.S. Kawar, and D.U. Sanli, Sustainable geodetic monitoring of the natural environment using the IGS, in Methods for Monitoring Sea Level, GPS and Tide Gauge Benchmark Monitoring, GPS Altimeter Calibration, Jet Propulsion Laboratory, Pasadena, Calif. USA (1998)

Blewitt, G., 1998, IGS densification program, in IGS Annual Report 1997, p. 24-25, IGS Central Bureau, Pasadena, California.

Davies, P.B.H. and G. Blewitt, Newcastle upon Tyne Global Network Associate Analysis Centre Annual Report 1996, IGS Annual Report, p. 237-252, IGS Central Bureau, Pasadena, Calif. USA (1997)

Blewitt, G., and P.B.H. Davies, Current plate motions: kinematic analysis techniques and GPS results, Eos Trans. AGU, Vol. 78(46), Fall Meeting Suppl., Abstract G41B-15, p. 160, 1997.

Gregorius, T.L.H., and G. Blewitt, Modeling weather fronts to improve GPS heights - a new tool for GPS meterology?, Eos Trans. AGU, Vol. 78(46), Fall Meeting Suppl., Abstract G12A-07, p. 145, 1997.

Blewitt, G., International GPS Service for Geodynamics: Turning the key to precise positioning, in Proc. of the Royal Institution of Chartered Surveyors Land and Hydrographic Surveyors Division Biennial Conference, 6-8 September 1996, Univ. of Nottingham (1996)

Davies P. and G. Blewitt, Type two associate analysis at Newcastle upon Tyne, in Proceedings of the IGS Workshop, May 15-18 1995, GeoForschungsZentrum, Potsdam, Germany, p.183-198 (1996)

Davies P. and G. Blewitt, Newcastle upon Tyne IGS Global Network Associate Analysis Centre Annual Report 1995, IGS Annual Report 1995, IGS Central Bureau, Jet Propulsion Lab. (1996)

Davies, P.B.H., and G. Blewitt, Combining global and regional GPS free networks, Eos Trans. AGU, Vol. 77(46), Fall Meeting Suppl., Abstract G72A-02, p. 130, 1996.

Blewitt, G., R.S. Kawar, and J. Handgraaf, Neolithic technology lessons for space geodesy, Eos. Trans. AGU, Vol. 77, Spring Meeting Suppl., Abstract G21A-06, 1996.

Kawar, R., J. Handgraaf and G. Blewitt, MORP: a new GPS station for continuous monitoring in the North East of England: case study for high stability permanent GPS stations site selection. Joint Association of the Geological Society, pp. 27-29, 1996.

Van Dam, T., G. Blewitt, and M. Heflin, Monitoring global change in Earth's shape, Eos Trans. AGU, Vol. 76, Spring Meeting Suppl., Invited Abstract G21C-04, p. 84, 1995.

Blewitt, G., and P.B.H. Davies, The contribution of GPS to the densification of ITRF, Eos Trans. AGU, Vol. 76, Spring Meeting Suppl., Invited Abstract G32A-04, p. 88, 1995.

Manurung, P., G. Blewitt, P. Cross, and P. Denys, Connecting Bangalore (India) station to the IGS network, Eos Trans. AGU, Vol. 76, Spring Meeting Suppl., Abstract G32A-13, p. 89, 1995.

Blewitt, G., T. Van Dam, M. Heflin, and D. Argus, Monitoring change in Earth's shape, Abstract of the International Union of Geodesy and Geophysics Meeting, Boulder, Colorado, 1995.

Blewitt G., T. Van Dam, and M.B. Heflin, Atmospheric loading effects and GPS time averaged positions, in Proceedings of the 1st Turkish International Symposium on Deformations, Istanbul, Turkey, p. 408-415 (1995)

Blewitt, G., Y. Bock, and J. Kouba, "Constructing the IGS polyhedron by distributed processing," in Proc. of the IGS Workshop, ed. by J. Zumberge, IGS Central Bureau, Pasadena, Calif., USA, p. 21-36 (1995) [pdf]

Berry, P., and G. Blewitt, "Space science in geodesy," Geoscientist, Vol. 4, No. 4, p. 14-15 (1994)

Blewitt, G., "GPS Technology Status Report: The Global Positioning System," in Report on the Surrey Workshop of the IAPSO Committee on Tide-Gauge Benchmark Fixing Committee, Ed. by Bill Carter, p. 17-26, NOAA, Silver Spring, MD, USA. (1994)

Blewitt, G., and Y. Bock, Global GPS network densification: a distributed processing approach, Eos Trans. AGU, Vol. 75(44), Fall Meeting Suppl., Abstract G42B-01, p. 182, 1994.

Tsuji, H., Y. Hatanaka, G. Blewitt, M. Heflin, K. Hurst, D. Jefferson, F. Webb, J. Zumberge, Detection of tectonic movements around Japan based on continuous GPS measurements from 1992 to 1993, Eos Trans. AGU, Vol. 74(43), Fall Meeting Suppl., Abstract G41B-07, p.191, 1993.

Heflin, M., G. Blewitt, D. Jefferson, Y. Vigue, F. Webb, J. Zummberge, and D. Argus, Global positions and velocities from one year of GPS data, Eos Trans. AGU, Vol. 74(43), Fall Meeting Suppl., Abstract G42A-20, p. 194, 1993.

Van Dam, T., G. Blewitt, and M. Heflin, GPS detects vertical surface displacements caused by atmospheric pressure loading, Eos Trans. AGU, Vol. 74(43), Fall Meeting Suppl., Abstract G21A-09, p.182, 1993.

Blewitt, G., M. Heflin, K. Hurst, D. Jefferson, Y. Vigue, F. Webb, and J. Zumberge, Viewing the Earth as a rotating, deforming polyhedron, using the Global Positioning System, Eos Trans. AGU, Vol. 74(16), Spring Meeting Suppl., Abstract U11A-08, p.48, 1993.

Heflin, M., G. Blewitt, Y. Vigue, P. Rongshi, J.L. Davis, A.E. Neill, J Mitrovica, T. Clark, J. Gipson, and C. Ma, Comparison of global GPS position estimates with VLBI and ITRF91, Eos Trans. AGU, Vol. 75(16), Spring Meeting Suppl., Abstract G12B-03, p.96, 1993.

Blewitt, G., Y. Bock, and G. Gendt, "Regional clusters and distributed processing," in Proc. of the IGS Analysis Center Workshop, Ed. by J. Kouba, p. 62-91, Ottawa, Canada (1993).

Blewitt, G., M.B. Heflin, Y. Vigue, J.F. Zumberge, D. Jefferson, and F.H. Webb, "Continuous monitoring on a global scale using GPS," in Proc. of the iRiS Conference, Kanazawa, Japan (1993).

Blewitt, G., M.B. Heflin, Y. Vigue, J.F. Zumberge, D. Jefferson, and F.H. Webb, "The Earth viewed as a deforming polyhedron: Method and results," in Proc. of the 1993 IGS Workshop, Ed. by G. Beutler and E. Brockmann, p. 165-174, Univ. of Berne, Switzerland (1993).

Blewitt, G., M.B. Heflin, Y. Vigue, F.H. Webb, J.F. Zumberge, and D. Jefferson, "Geocentric site coordinates from the Jet Propulsion Laboratory using GPS," in IERS Technical Note 14: "Earth orientation, reference frames and atmospheric excitation functions submitted for the 1992 IERS Annual Report,", p. 39-40, Ed. by P. Charlot, Paris Observatory, France (1993).

Blewitt, G., and S.M. Lichten, "Carrier phase ambiguity resolution up to 12000 km: Results from the GIG'91 experiment," in Proc. of the Sixth Int. Symp. on Satellite Positioning, Columbus, Ohio State University, USA (1992)

Statistics of other publications not listed above

Pre-1993 geodesy abstracts in Eos Trans. AGU: 42
Pre-1988 physics conference proceedings: 20

Web Sites

Blewitt G. (chair), K. Larson K, R. Bennett, E. Calais, M. Craymer, T. Herring, M. Miller, G. Sella, R. Snay, and M. Tamisiea, Stable North America Reference Frame Working Group, http://www.unavco.org/research_science/workinggroups_projects/snarf/snarf.html

Blewitt, G., W. C. Hammond, C. Kreemer, H.-P. Plag, Nevada Geodetic Laboratory, 2005, http://geodesy.unr.edu/

Tahoe Researchers and Educators http://www.tahoe.unr.edu/profiles

Blewitt, G., W. C. Hammond, C. Kreemer, H.-P. Plag, Monitoring Tectonic Monitoring Tectonic Extension and Lake Loading of the Tahoe Basin with GPS, http://www.tahoe.unr.edu/projects

Blewitt, G., et al., GPSVEL Working Group http://sps.unavco.org/crustal_motion/dxdt/gpsvel/

OTHER PROFESSIONAL ACTIVITIES

Member, International Association of Geodesy Sub-Commission 1.2 on Global Reference Frames (2007-2010)

International GPS Governing Board, official representative of the International Association of Geodesy (2003 - present)

Chair, EarthScope Stable North America Reference Frame (SNARF) Working Group (2004-present) [link]
  -   1st SNARF Workshop, Boulder, CO, Jan. 2004 [link]
  -   - 2nd SNARF Workshop, Montreal, Canada, May 2004 [link]
  -   - 3rd SNARF Workshop, Santa Ana Pueblo, NM, Mar. 2005 [link]
  -   - 4th SNARF Workshop, Stevenson, WA, Jun. 2005 [link]
  -   - 5th SNARF Workshop, Denver, CO, Mar. 2006 [link]
  -   - 6th SNARF Workshop, Ottawa, Canada, Nov. 2006 [link]
  -   - 7th SNARF Workshop, Monterey, CA, Mar. 2007 [link]
  -   - 8th SNARF Workshop, San Francisco, CA, Dec. 2007

Member, AGU Fellows Committee (2006-present)

Member, AGU Geodesy Award Committee (2006-present)

Member, IGS Elections Committee (2007)

Member, IGS Strategic Planning Committee (2006-2007)

Special Session Convenor, "Developing a Stable North America Reference Frame," Fall 2007 AGU Meeting, San Francisco, Dec. 2007

Special Session Convenor, "JGS003 Earthquake and Volcano Geodesy," XXIV Assembly of the International Union of Geodesy and Geophysics, Perugia, Italy, July 2007.

Scientific Organizing Committee, "The International GNSS Service (IGS): Perspectives and Visions for 2010 and beyond", Darmstadt, Germany, May 2006.

Science Advisory Team Member, for JPL NASA REASoN project “Inter-Service Data Integration for Geodetic Operations (INDIGO),” 2004-2007.

Member, UNAVCO elections committee (2003-2005).

Chair, UNAVCO membership committee (2001-present).

Founding Member of Special Bureau for Loading, Global Geophysical Fluids Center, International Earth Rotation Service (2002-2007).

Special Session Convenor, "Earth Rotation and Geocenter," Fall 2005 Meeting, San Francisco, Dec. 2005.

Special Session Chair, "Natural Hazards and Coastal Processes: Monitoring and Mitigation," Fall 2005 Meeting, San Francisco, Dec. 2005.

Organizing Committee, EarthScope GreatBREAK Workshop (held June 2004).

Chair, EarthScope Stable North America Reference Frame Working Group (Workshops held Jan. 2004, May 2004, March 2005, June 2005).

Member, EarthScope Plate Boundary Observatory GPS Extension Siting Working Group (2004-present).

International GPS Governing Board, official representative of the International Association of Geodesy (2003 - present)

Proposal Review Panel, NSF EarthScope (2003, 2004)

Special Session Convener, "Toward a Stable North America-Fixed Reference Frame," American Geophysical Union Joint Assembly, Montreal (May 2004).

Special Session Convener, "Advancing the Cutting Edge of Geodesy II: Dynamics of the Earth," American Geophysical Union, San Francisco (Dec. 2003).

Special Session Convener, "Seasonal Signals in Space Geodetic Solutions," American Geophysical Union, San Francisco (Dec. 2003).

Special Session Convener, "Signal Versus Noise in GPS Height Time Series," American Geophysical Union, San Francisco (Dec. 2003).

Scientific Organizing Committee, Workshop on the State of GPS Vertical Positioning Precision: Separation of Earth Processes by Space Geodesy, Sponsored by the European Center for Geodynamics and Seismology, Luxembourg (April 2003).

Proposal Review Panel, NASA Solid Earth and Natural Hazards Applications (2002).

Joint Council, IRIS and UNAVCO, 2002-2003.

Special Session Convener, "Interaction Between Solid Earth and Its Fluid Envelope: Insights via Earth Rotation and Mass Redistribution Studies," American Geophysical Union, San Francisco (Dec. 2001).

Chairman of the Board, UNAVCO Inc. (2001-2003)

Governing Board, International Association of Geodesy Commission XIV, "Crustal Deformation" (2000-2003).

Steering Committee, University NAVSTAR Consortium (UNAVCO) (1999-2002)

Vice Chair, Global Strain Rate Map, International Lithosphere Program (under Int. Council for Science), (1999-2004).

Chair of Rotation Datum Sub-Group, International Earth Rotation Service (IERS) Working Group on ITRF Datum (1999-2003)

Governing Board, International GPS Service (1996-2001)

Governing Board, International Association of Geodesy Special Commission VI, "Working Group of European Geo-scientists for the Establishment of Networks for Earth-Science Research (WEGENER)" (1995-2004).

Chairman, International Association of Geodesy Special Study Group "Advanced GPS Analysis for Precise Positioning." (1995-1999)

Director of Studies, British Council International Seminars in Britain, "GPS Geodetic Infrastructure in the Greater Middle East Region," Newcastle, UK (March 1998)

Chairman of the Scientific Organizing Committee, "Ninth International Symposium on Recent Crustal Movements," International Association of Geodesy workshop, Cairo, Egypt (November 1998).

Session Convenor, "Symposium on Atmospheric Sounding with GPS," European Geophysical Society, Nice, France (May 1998).

Invited Lecturer, postdoctoral short-course in GPS Geodesy, Nordic Geodetic Commission, Bastad, Sweden (1996)

Invited Lecturer, postdoctoral short-course in GPS Geodesy, Netherlands Geodetic Commission, Delft University of Technology, Netherlands (1997)

Invited Lecturer, postdoctoral short-course in GPS Geodesy, Italian Space Agency, Matera, Italy (1998)

Secretary, American Geophysical Union Geodesy Section, 1994-1996